Pigmented lesions

Question 1

What are 5 types of melanomas?

Answer 1

superfical spreading  
nodular 
acral 
desmoplastic 
amelanocytic melanoma

Question 2

What is the breslow thickness and corresponding surgical margin?

Answer 2

Reported for invasive melanomas. It is measured vertically in millimetres from the top of the granular layer (or base of superficial ulceration) to the deepest point of tumour involvement. It is a strong predictor of outcome

melanoma in situ - 5mm surgical margin
<1mm = 1cm
1-4mm = 1-2cm
>4mm = 2cm

(dermnet nz)

Question 3

Risk factors for melanoma (dermnet nz)

Answer 3

Increasing age (see above)
Previous invasive melanoma or melanoma in situ
Previousbasalorsquamouscellcarcinoma
Many melanocyticnaevi(moles)
Multiple (>5)atypicalnaevi(large or histologically dysplastic moles)
Strong family history of melanoma with 2 or more first-degree relatives affected
White skin that burns easily
Parkinson disease

Question 4

Most common type of melanoma in australia?

Answer 4

superfical preading melanoma (70%)

dermnetnz

Question 5

Nodular melanomas, have only verticle growth phase. What % does it account for?

Answer 5

15-20% (dermnetnz)

Question 6

What are Nodular M’s often mistaken for?

Answer 6

haemangioma
pyogenic graunloma
(dermnetnz)